Muzzle attachment for guns



Dec. 14, 1937. s. G. GREEN MUZZLE ATTACHMENT FOR GUNS Filed Oct. 29, 1936 Ifiventur Eamu E1 I2- Green At turne Patented Dec. 14, 1937 UNITED STATES PATENT OFFICE 4 Claims.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to a muzzle attachment for guns and more particularly it has reference to that class of attachments serving to check recoil, silence the report, eliminate smoke, and conceal flash.

The purpose of the invention is to provide a gas-receiving casing having a simple and inexpensive arrangement for cooling the gases prior to their discharge into the atmosphere.

To these and other ends, the invention consists in the construction, arrangement and combination of elements described hereinafter and pointed out in the claims forming a part of this specification.

A practical embodiment of the invention is illustrated in the accompanying drawing, wherein:

Fig. 1 is a longitudinal sectional view of the improved device applied to a gun.

Fig. 2 is a view in front elevation.

Fig. 3 is a sectional view on the line 33 of Fig. 1.

Referring to the drawing by characters of reference there is shown the front portion of a machine gun comprising a jacket 5 having a front plate 6 in which the muzzle of a gun barrel 1 is reciprocally mounted. The front plate is formed with an externally threaded tubular extension 8 for mounting the muzzle attachment forming the subject of this invention.

The attachment consists of an inner gas-receiving casing A which cooperates with a spaced outer casing B to establish an annular chamber 9 for holding a cooling fluid. The inner casing A is formed of a tubular rear body part l establishing an expansion chamber l l and a tubular front neck part l2 establishing an ,expansion chamber and bullet passage I3 and opening into atmosphere. The two parts are connected by a shoulder or wall l4 forming the front wall of the expansion chamber II. The tubular parts 10 and 12 are preferably flared so that the chambers H and I3 have cross-sectional areas gradually increasing towards the front.

The inner casing A has a rear flange l and a front flange I6 which constitute the ends of the annular chamber 9 and serve to space and carry the outer casing B which is secured as by welding.

A plurality of tubes [1, constituting flues, lead from the expansion chamber ll through the annular fluid chamber 9 and vent into atmosphere. The tubes are preferably arranged about the front part l2.of the inner casing and are individually inserted through one of a series of apertures I8 in the front flange I6 and threaded in apertures IS in the front wall [4 of the expansion chamber I l. The tubes project from the front flange so that they may each receive a nut 20 which holds a gasket 2| against the flange to prevent leakage of water from the chamber 9.

The outer casing B is provided with a pair of apertured plugs constituting an inlet 22 and an outlet 23 of a fluid circulating system which includes conduits 24 and 25.

I claim:

1. A muzzle attachment for a gun comprising an inner casing for receiving the gases of discharge of the gun and having a rear body part and a front neck part connected thereto by a shoulder, flanges on the body and neck parts, an outer casing mounted on the flanges and cooperating with the inner casing .to establish a the flange of the neck disposed in the fluid chamher and threaded in the shoulder, said flues projecting from the flange of the neck, a gasket on the projecting end of each flue and a nut holding each gasket against the flange.

2. A muzzle attachment for a gun comprising an inner casing for receiving the gases of discharge of the gun and having a rear body part and a front neck part, flanges on the body and neck parts, an outer casing mounted on the flanges and cooperating with the inner casing to establish a chamber for receiving a cooling fluid, a fluid inlet in the outer casing, a fluid outlet in the outer casing, and a plurality of flues leading from the body part to atmosphere and supported in the flange of the neck part, said flues disposed in the fluid chamber.

3. A muzzle attachment for a gun comprising an inner casing for receiving the gases of discharge of the gun and having a rear body part and a front neck part, flanges on the body and neck parts, an outer casing mounted on the flanges and cooperating with the inner casing to establish a chamber for receiving a cooling fluid, and a plurality of flues leading from the body part to atmosphere and supported in the flange of the neck part, said flues disposed in the fluid chamber.

4. A muzzle attachment for a gun comprising an inner casing for receiving the gases of dis-. charge of the gun and having an expansion chamber in its rear portion, an outer casing spaced from the inner casing, end walls between the casings and cooperating therewith to establish a chamber for receiving a cooling fluid, and a plurality of flues leading from the expansion chamber to atmosphere and supported in the front end wall, said flues disposed in the fluid chamber.

SAMUEL G. GREEN. 

